HG 21516-1995 Swivel cover plate flat weld flange manhole. Attached picture HG21516-1995 standard download decompression password: www.bzxz.net

Rotating cover plate type flat weld flange manhole
HG21516-95
1. Subject content and scope of application
This standard specifies the type, basic parameters, dimensions, technical requirements and relevant use regulations of carbon steel rotating cover plate type flat weld flange manhole.
This standard is applicable to rotating cover plate type flat weld flange manholes with nominal pressure PN less than and equal to 0.6MPa and working temperature limited to the range specified in Table 32 according to material category. Note: The working temperature in Table 3-2 is only applicable to the pressure-bearing parts of the manhole, excluding gaskets. The working temperature of the gasket should be determined according to the corresponding gasket standard.
HGJ45-91
HGJ61-91
HGJ69-91
HGJ70-91www.bzxz.net
HGJ71-91
HGJ75-91
GB91-86
GB95-85
HG21514-95
Cited Standards
《Raised Face Slip-On Steel Pipe Flange》
《Raised Face Steel Method "Lan Gai"
"Asbestos rubber sheet gasket for steel pipe flange""Flexible graphite composite gasket for steel pipe flange""Polytetrafluoroethylene coated gasket for steel pipe flange""Fasteners for steel pipe flange"
"Split pin"
"Flat washer grade C"
"Types and technical conditions of manholes and handholes made of carbon steel and low alloy steel" Types, basic parameters and dimensions
The types, basic parameters and dimensions of manholes are shown in the figure below and the provisions of Tables 3-1 to 3-3. A-type cover shaft ear
B-type cover shaft ear
Standard number
HGJ75—91
HGJ75—91
HGJ45—91
HGJ69--91
HGJ70—91
HGJ 71--91
HGJ61-91
GB91-86
GB95-85
Nominal pressure
Flange cover
Cover shaft ear (1)
Flange shaft ear (1)
Flange shaft ear (2))
Cover shaft ear (2)g
Details
See dimension table
See dimension table
Q235-A·F
Category code
Q235-A
Q235-A
Table 3-1
Asbestos rubber sheet gasket||tt| |Flexible stone
Composite pad
PTFE pad
Q235-A
Q235-A·F
Q235-A·F
Low carbon steel
Q235—A·F
Q235-A·F
Q235-A·F
Q235-A·F
Maximum non-shock working pressure at working temperature Table working temperature
>-20~<0
Maximum non-shock working pressure
Note: The maximum non-shock working pressure at intermediate temperatures can be determined by interpolation according to the pressure values ​​in this table. 30
Flexible graphite
Composite pad
轰3—2
(urur)
Technical requirements
The technical requirements for manholes shall comply with the provisions of Chapter 4 “Technical Conditions” in HG21514. 32
Marking example
Nominal pressure PNO.6, nominal diameter DN450, H=220, A-type cover shaft ear, using type material, where the gasket is asbestos rubber sheet, the specified marking symbol is: Manhole (A·G) A450-0.6HG21516—95H250 (non-standard size) The specified marking symbol for the above manhole is: Manhole (A·G) A450-0.6H250HG21516-9533
Use this standard Proposing unit, editor-in-chief
Additional instructions
And main drafters
Proposing unit: Equipment Design Technology Center Station, Ministry of Chemical Industry Editor-in-chief: China Tianchen Chemical Engineering Company Main drafters: Zhao Chenghe Li Wenren Shen Pengfei
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